Just when Qi Zhengdao was riding a plane and lamenting at high altitude.

Monde was at home and only started watching episode 35 of "Once Upon a Time on Earth".

According to the trailer, this is the penultimate episode of the second part.

Picking up on the previous episode, this one is sure to be wonderful, at least, in Monder's opinion, it should explain the significance of cosmic sociology.

Monde showered and changed his clothes, turned off all chat apps, and only started watching this episode.

At the beginning of the plot, it was Luo Ji and Shi Qiang.

Luo Ji asked everyone to go home to maintain order in the city, and then came to a desert with Shi Qiang.

"Let's get started."

Luo Ji opened his mouth and said that he wanted to explain to Shi Qiang why that star was destroyed.

He told Shi Qiang about the two axioms of cosmic sociology.

[First, survival is the first need of civilization. 】

[Second, civilization continues to grow and expand, but the total amount of matter in the universe remains the same. 】

Although Shi Qiang could understand these two obvious words, he couldn't infer anything from them.

"First of all, let's talk about the dark battle, if I say that Starship Earth is the epitome of cosmic civilization, do you believe it?"

"No, starship Earth lacks resources such as fuel and accessories, but the universe is not lacking, and the universe is too big."

"You are wrong, the universe is big, but life is bigger! This is what the second axiom suggests, that the total amount of matter in the universe is basically constant, but life is growing exponentially! ”

With the dialogue between the two, the picture also drifts from their backs to the starry sky, starry, and transitions to the sea.

The bacteria in the sea, constantly dividing, growing exponentially, and without restraint, quickly filling the entire oceans of the earth.

Civilization, born from a single planet, has also grown so rapidly that it has lit up countless galaxies.

Seeing all this, Monde also began to think at the same time.

Soon, he thought about evolution.

The first stage of the theory of evolution is free reproduction, in which organisms reproduce unfettered in the environment, gradually reaching the limit of what the environment can accommodate.

So the next step should be the competition for survival?

Monder shuddered.

The competition for survival in the Earth's environment, extending it to the universe.

Isn't that a civilization war?

A word came to Mendel's mind, he couldn't remember which comment or analysis of Once Upon a Time on Earth he had seen it, and he had only thought the composition of the word was interesting, but now he felt that it was the right word to describe the present situation.

Survival is dead.

"You don't have to look at it in the long run, the whole universe is already an existential death situation."

Luo Ji said.

The universe is more than 10 billion years old.

Even if life only develops for a few billion years, it is enough to spread throughout the universe.

Even if the appearance of life itself is a small probability event, it is an inevitability when multiplying the vastness of the universe.

Judging by the current indications, it is very likely that the universe is already crowded with life.

"That's not right, the universe looks empty, except for the Trisolarans, there is no other alien life?"

Shi Qiang asked rhetorically.

Luo Ji lit a cigarette for each of them and stood a little farther away.

In the dark night, only the sparks on the cigarette butts shimmered.

Luo Ji then defined the good and evil of civilization, a good civilization is a world that does not take the initiative to attack and destroy other civilizations, and an evil civilization is the opposite.

"Below, you already know the existence of my civilization in the universe, you think about it, what choice do you have for me."

Luo Ji asked.

"I choose to communicate with you?"

"If you do that, you pay your own price, you expose your existence."

With every word, the two gradually sketched a picture of communication and exchange between the two civilizations on a cosmic scale.

Since it is impossible to confirm the good and evil of the other party's civilization, and at the same time, the other party cannot confirm the good and evil of our own, so the exchange is not valid.

This is the chain of suspicion, which has nothing to do with the good or evil of civilization, and is the inevitable result in the context of the universe, where survival is the first need.

At the same time, the technological explosion is a capability inherent in every civilization, especially after learning about other civilizations, this explosion will be more rapid, so this also cuts off the idea of communicating with other weak civilizations when they are discovered.

"Then I'll just keep silent."

Shi Qiang said, and suddenly felt that something was wrong.

"That's not okay, if you're stronger than me, since I can find you, then you can definitely find me, if you're weaker than me, but there is a possibility of a technological explosion, then it's the first case again, to sum up, whether it's letting you know about my existence, or letting you exist, it's dangerous for me."

"Dashi, you are really a very clear-headed person."

"From here, my head can still keep up with you."

Hearing Shi Qiang's words, Luo Ji was silent for a while before speaking.

"Great history, it's not the beginning, our inference is over."

Hearing this, Monder was stunned.

He was still waiting for Luo Ji to continue to paint a picture of the civilization of cosmic sociology, why did it suddenly end?

Mengde tried to understand, but saw that Shi Qiang on the screen understood something, and scolded.

"Extrapolate this choice of yours to hundreds of millions of civilizations among hundreds of billions of stars, and the big picture will come out."

Luo Ji nodded.

"It's too dark, isn't it?"

"The real universe is so dark."

Luo Ji extinguished the cigarette butt, and the world was plunged into darkness.

"The universe is a dark forest, and every civilization is a hunter with a gun, sneaking through the forest like a ghost, gently brushing away the branches that stand in the way, trying not to make a sound from his steps, and even breathing carefully."

"He has to be careful, because the forest is full of hunters who are just like him. If he finds another life, no matter what happens to the other party, there is only one thing he can do: shoot and destroy! ”

"In this forest, others are hell, an eternal threat, and any life that reveals its existence will soon be wiped out."

"This is the picture of cosmic civilization, and this is the explanation of Fermi's paradox."

The picture is farther away from the earth, hundreds of millions of stars are shining, this is a bright ocean of stars, but at this moment, in Luo Ji's mouth, the stars that radiate light are the darkest forest.

Shi Qiang lit another cigarette, which gave the world a little brighter.

"But in the dark forest, there was a stupid child named Human, who made a fire and shouted: Here I am! I'm here! ”

Luo Ji said, unable to hear what the meaning was in the tone.

Monder hears it all.

The inner shock is incomparable.

At this moment, it is rare for Jingping to be sunny.

Although there are no stars at night, the moon still shines on the earth.

Monder looked out the window.

Suddenly I felt a wave of fear.

Who knows, in this starry sky, how many hunters saw the cry of the earth, and how many hunters, waiting to shoot?

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